function changes(firstYear,secYear,selected){

if(selected==0){
	
	panjang=document.yearSelect.lastYear.length;
	for(i=panjang;i>=0;i--)
	document.yearSelect.lastYear.options[i]=null;
	document.yearSelect.lastYear.options[0]=new Option("---","---");
	//document.getElementById("submit").disabled = true;
	
}else{
	
	
	panjang=document.yearSelect.lastYear.length;
	for(i=panjang;i>=0;i--)
	document.yearSelect.lastYear.options[i]=null;
	
	i=0;
	for (m=firstYear;m<=secYear;m++){
	
	document.yearSelect.lastYear.options[i]=new Option(m,m);
	i++;
	}
	document.getElementById("submit").disabled = false;
	
}
}

function enablebtnsubmit(elements){

		document.getElementById("submit").disabled = false;	
	
}